The state government has issued orders to this effect, said a statement from the office of the director general of police Friday.
This is in addition to Rs.10 lakh reward announced by the National Investigation Agency (NIA), which is probing the blasts.
The twin-blasts near Rajiv Chowk at Dilsukhnagar killed 17 people and injured many others.
The orders recalled that two improvised explosive devices (IEDs) were suspected to have been tied to bicycles and operated using timer devices. More than three months after the terror attack, the police or NIA have not achieved any breakthrough in the case.